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feat: add array/base/cuany-by-right
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PR-URL: #2667
Closes: #2327

Co-authored-by: Philipp Burckhardt <pburckhardt@outlook.com>
Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com>
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DevMhrn and Planeshifter authored Sep 25, 2024
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152 changes: 152 additions & 0 deletions lib/node_modules/@stdlib/array/base/cuany-by-right/README.md
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<!--
@license Apache-2.0
Copyright (c) 2024 The Stdlib Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->

# cuanyByRight

> Cumulatively test whether at least one element in a provided array passes a test implemented by a predicate function, while iterating from right-to-left.
<section class="usage">

## Usage

```javascript
var cuanyByRight = require( '@stdlib/array/base/cuany-by-right' );
```

#### cuanyByRight( x, predicate\[, thisArg] )

Cumulatively tests whether at least one element in a provided array passes a test implemented by a `predicate` function, while iterating from right-to-left.

```javascript
function isPositive( value ) {
return ( value > 0 );
}

var x = [ 0, 0, 0, 1, 0 ];

var y = cuanyByRight( x, isPositive );
// returns [ false, true, true, true, true ]
```

The `predicate` function is provided three arguments:

- **value**: current array element.
- **index**: current array element index.
- **arr**: input array.

To set the `predicate` function execution context, provide a `thisArg`.

```javascript
function isPositive( value ) {
this.count += 1;
return ( value > 0 );
}

var x = [ 0, 1, 0, 0, 0 ];

var context = {
'count': 0
};

var out = cuanyByRight( x, isPositive, context );
// returns [ false, false, false, true, true ]

var cnt = context.count;
// returns 4
```

#### cuanyByRight.assign( x, out, stride, offset, predicate\[, thisArg] )

Cumulatively tests whether at least one element in a provided array passes a test implemented by a `predicate` function, while iterating from right-to-left, and assigns results to a provided output array.

```javascript
function isPositive( value ) {
return ( value > 0 );
}

var x = [ 0, 1, 0, 0, 0 ];
var y = [ false, null, false, null, false, null, false, null, false, null ];

var out = cuanyByRight.assign( x, y, 2, 0, isPositive );
// returns [ false, null, false, null, false, null, true, null, true, null ]

var bool = ( out === y );
// returns true
```

The function supports the following parameters:

- **x**: input array.
- **out**: output array.
- **stride**: output array stride.
- **offset**: output array offset.
- **predicate**: test function.

</section>

<!-- /.usage -->

<section class="notes">

</section>

<!-- /.notes -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
function isPositive( value ) {
return ( value > 0 );
}

var bernoulli = require( '@stdlib/random/array/bernoulli' );
var cuanyByRight = require( '@stdlib/array/base/cuany-by-right' );

// Create an array of random values:
var x = bernoulli( 10, 0.1 );
console.log( x );

var out = cuanyByRight( x, isPositive );
console.log( out );
```

</section>

<!-- /.examples -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

</section>

<!-- /.related -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="links">

</section>

<!-- /.links -->
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/**
* @license Apache-2.0
*
* Copyright (c) 2024 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

'use strict';

// MODULES //

var bench = require( '@stdlib/bench' );
var pow = require( '@stdlib/math/base/special/pow' );
var isArray = require( '@stdlib/assert/is-array' );
var isPositiveInteger = require( '@stdlib/assert/is-positive-integer' ).isPrimitive;
var filled = require( '@stdlib/array/base/filled' );
var pkg = require( './../package.json' ).name;
var cuanyByRight = require( './../lib' );


// FUNCTIONS //

/**
* Creates a benchmark function.
*
* @private
* @param {PositiveInteger} len - array length
* @returns {Function} benchmark function
*/
function createBenchmark( len ) {
var x = filled( 1.5, len );
return benchmark;

/**
* Benchmark function.
*
* @private
* @param {Benchmark} b - benchmark instance
*/
function benchmark( b ) {
var y;
var v;
var i;

y = filled( false, len );

b.tic();
for ( i = 0; i < b.iterations; i++ ) {
v = cuanyByRight.assign( x, y, 1, 0, isPositiveInteger );
if ( typeof v !== 'object' ) {
b.fail( 'should return an array' );
}
}
b.toc();
if ( !isArray( v ) ) {
b.fail( 'should return an array' );
}
b.pass( 'benchmark finished' );
b.end();
}
}


// MAIN //

/**
* Main execution sequence.
*
* @private
*/
function main() {
var len;
var min;
var max;
var f;
var i;

min = 1; // 10^min
max = 6; // 10^max

for ( i = min; i <= max; i++ ) {
len = pow( 10, i );
f = createBenchmark( len );
bench( pkg+':assign:len='+len, f );
}
}

main();
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/**
* @license Apache-2.0
*
* Copyright (c) 2024 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

'use strict';

// MODULES //

var bench = require( '@stdlib/bench' );
var isArray = require( '@stdlib/assert/is-array' );
var isPositiveInteger = require( '@stdlib/assert/is-positive-integer' ).isPrimitive;
var pkg = require( './../package.json' ).name;
var cuanyByRight = require( './../lib' );


// MAIN //

bench( pkg, function benchmark( b ) {
var x;
var i;
var v;

x = [ 1, 1, 0, 0, 0 ];

b.tic();
for ( i = 0; i < b.iterations; i++ ) {
v = cuanyByRight( x, isPositiveInteger );
if ( typeof v !== 'object' ) {
b.fail( 'should return an array' );
}
}
b.toc();
if ( !isArray( v ) ) {
b.fail( 'should return an array' );
}
b.pass( 'benchmark finished' );
b.end();
});
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Coverage Report

Package Statements Branches Functions Lines
array/base/cuany-by-right $\color{green}298/298$
$\color{green}+100.00\%$
$\color{green}16/16$
$\color{green}+100.00\%$
$\color{green}4/4$
$\color{green}+100.00\%$
$\color{green}298/298$
$\color{green}+100.00\%$

The above coverage report was generated for the changes in this push.

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